Hub-borer



(No Model.) 2 sheets-sheen 1. A. O. ABBOTT.

HUB BORER. No. 451.794. Patented 1v1a.y`5, 1891.

FIGI

2 Sheets-Sheet 2.

(No Modem A. 0. ABBOTT.

HUB BORBR.

Patented May 5, 1891.

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yUNTTED STATES PATENT OEEICE.

ADRIAN O. ABBOTT, OF HUDSON, MICHIGAN.

HUB-BORER.

SPECIFICATION forming part of Letters Patent No. 451,794, dated May 5, 1891.

Application filed October 6I 1890.

To all whom, it may concern:

Be it known that I, ADRIAN O. ABBOTT, a citizen of the United States, residing at Hudson, in the county of Lenawee and State of Michigan, haveinvented certain new and useful Improvements in Hub-Borers, of which the following is a specification.

My present invention is an improvement upon the machine for which Letters Patent No. 146,420 were granted to me on January 13, 1874; and my invention consists in certain features of novelty to be applied to such machine for the purpose of permitting a more A accurate and convenient centering of the hub in the machine, the more perfect adjustment to hubs of different lengths, and a more accurate and convenient setting of the arbor for dierent-sized bores and different degrees of taper.

The improvements consist in a frame carrying a rotating ring which receives the wheel and a pair of centering-arms pivoted to the face-rin g at points equidistant from the screw which projects through said ring, said arms being geared together by toothed segments and having the compound curved inner edges, whereby they are adapted to grip the hub, and a controlling-lever having suitable means for locking it in any desired position.

The invention further consists in an adjustable frame or carriage carrying an arbor-y block and pivoted at its forward end, said arbor-block being adjustable laterally, whereby the arbor is vadapted to cut a bore of the proper size and of any desired degree of taper.

In order that the invention may be more fully understood, I will proceed to describe the same with reference to the accompanying drawings, in which- Figure 1 is a face view of a borer having my improvements attached. Fig. 2 is a side elevation of the same. Fig. 3 is aplan of the carriage. Fig. 4 is a rear view of the same. Fig. 5 is a horizontal axial section on au enlarged scale, showing the connection between the fixed and rotating rings and the operation of my device.

1 represents the base-plate, having tracks 2 I and 3, the sliding carriage being adapted to be locked in position on said track by a thumbscrew 4.

5 represents the lower part of the carriage,

Serial No. 367,235. (No model.)

havingthe forward projection 6 and upwardlyextending lugs 7, in which are set-screws 8, and 9 is a frame constituting the upper part of the carriage, terminating in a forward projection 12, pivoted at 13 to the corresponding projection 6 of the lower part, and having the bifurcated rear portion 14 15. The arm 14 is longer than the arm l5. Between the arms 14 and 15, and secured therein by plates 19, is the block 20, which carries the arbor. This block is readily adjustable, being held in place at the rear by the, set-screws 8, one of which impinges on the rear end of the block andthe other upon the long arm 14, which is constantlyin contact with the rear end of the block, While the forward end of the block is held securely between'the set-screws 21, mounted in the arms 14 and 15.

V22 represents the end of the arbor-block,

having the set-screw23, andinner thimble 24,

held by said screw for reducing the bore in the block when a small arbor is used.

25 represents the forward ends of the baseplate, to which is secured-the base-ring 26, the latter also being connected to the baseplate by brackets 27.

28 is the rotating ring, which turns upon the base-ring 26 and has attached to it the face-ring 29, which is provided with clamps 30, having nuts 31 for the purpose of securing the wheel rigidly to'said face-ring.

32 represents the centering arms, which are pivoted at 33 and have the toothed segments 34 and compound curved ends 35. One of said arms has the controlling-lever 36, provided with the locking-rod 37, passing'through the socket 38 in bracket 39, where it is adapted to be secured by means of the sliding lock-nut 40, having set-screw 41.

By means of the sliding carriage the arbor may always be adj usted" to the length of the hub operated upon. Bymeans of the centering arms geared together, as shown, any sized hub may be brought in proper position for boring, inasmuch as eacharm, being provided with the compound curved inner edges, always has two points equidistant from the center which contact with the hub. The arms are worked simultaneously by the controlling-lever, which has means for locking it in any desired position, and by means of the particular arrangement of carriage the arbor may IOO be adjusted to any length of hub, also to cut any sized opening at the front, and to cut the proper sized bore and opening at the butt.

The operation of my device is as follows: The wheel is mounted on the turning ring face inward, the small end of the hub being embraced by the centering arms. The wheel being centered and the spokes secured against the face-ring by means of clamps 30, the carriage is moved longitudinally on the base until the pivot is directly under the small end or point of the hub. The front end of the arbor is then moved sidewise a slight distance by means `Vof thumb-screws 2l to determine the size of hole to be bored, the radius of the bore at the front end or point of the hub being the distance the end of the arbor is moved to one side of the middle line of the carriage, which' is parallel with the axis of the wheel. The set-screws 21 are carried by the upper part of the carriage, and they move the block relatively to the carriage. In this movement the rear end of the block is held A pivotally by means'of the rear set-screws,

which are carried by the lower part of the carriage. Afterthe size of the hole at the point of the hub is thus determined, the taper of the hole, and consequently the size of the hole at the rear, is determined by shift-A ing the upper part of the carriage on its front pivot by means of the rear set-screws 8. This alters the angle of the arbor to the axis of the Wheel without altering the position of the head of the arbor relatively to the point of the hub, because the head of the arbor comes in contact with the hub directly above the pivot on which the upper part of the carriage swings, inasmuch as said pivot was first brought immediately beneath the small end or point of the hub. The front thumb-screws absolutely govern the size at the front and the rear set-screws the size of the bore at the rear or the taper,each regardless of the other.

The boring is done by rotating the face-ring, to which the wheel is attached by a suitable handle 42, or by grasping the wheel, as eX- plained in my patent heretofore referred to, the arbor being gradually fed forward du ring the operation.

Having thus described my invention, the

following is what I claim as new therein andv desire to secure'by Letters Patent:

1. In a hub-borer, the combination of the frame carrying the borer, the wheel-carrying frame, and the pivoted hub-centering arms arranged to cross eachother and grip the hub between them, substantially as and for the purpose set forth.

2. In a hub-borer,the combination of the frame carrying the borer, the wheel-carrying frame rotatable on the borer-frame, and the centering-arms pivoted on the wheel-frame, arranged to cross each other and grip the hub between them, geared together, and having means for fixing them adj ustably, as and for the purpose set forth.

3. In a hub-borer, the combination of the main frame, the borer, the rotating wheelframe through which the borer passes, and the curved centering-arms pivoted at points equidistant from the borer and having segments geared together, the controlling-lever, and means foradjustably fixing the controlling-lever, substantially as and for the purpose set forth.

4. In a hub-borer7 the combination of the rotatable frame for carrying the wheel, the frame pivoted at its forward end, the arbor suitably mounted on said pivoted frame, means for adjusting the arbor laterally, and means for swinging said pivoted frame on its pivot, all substantially as set forth.

5. The combination of the base supporting the wheel-carrying ring, the longitudinallyadjustable carriage on said base, a pivoted frame mounted on the carriage, the arborblock carrying the screw mounted on the pivoted frame, the set-screws for adjusting the block on the pivoted frame, and the set-screws for adjusting the angle of the pivoted frame Vrelatively to the carriage, as and for the purpose explained.

6. In a hub-borer, the combination, with the wheel-frame, of the arbor-carriage consisting of a lower longitudinally-adj ustable part and the upper part secured at its front end by a pivot carried by the lower part and adapted to be brought beneath the end of the hub, and means for adjusting the rear end of the upper part laterally, substantially as and for the purpose set forth.

7. The combination of the wheel-frame and the carriage, said carriage consisting of the lower portion mounted upon a suitable track on the base-plate and having a forward projection, the upper portion consisting of the bifurcated plate having a forward projection by which it is pivoted to the corresponding part of the lower portion of the carriage and a rearwardly-extending arm, a block carrying the arbor mounted in the bifurcated plate, set-screws in the bifurcated plate engaging the forward end of' the arbor-block, and setscrews mounted in lugs formed on the bottom portion of the carriage and engaging the rear ends of the arbor-block and bifurcated plate, all substantially as described, and for the purposes set forth.

ADRIAN O. ABBOTT.

Witnesses:

E. J. SoUTHwoRTH, J No. H. BoIEs.

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